基于信道负载预测的VANET传输功率控制算法
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摘要
在车载自组网(VANET)中,车流量到达一定密度时会造成信道拥塞,导致协作式安全应用失效。针对该问题,设计了一个基于信道负载预测的车联网信标消息传输功率控制算法。通过信道忙时比率(CBR)评估当前时刻信道负载,根据差分自回归移动平均模型(ARIMA)对信道下一时刻负载进行预测,将信道负载预测值与预设阈值进行比较,自适应调整下一时刻信标传输功率,避免信道拥塞。通过仿真实验表明,该算法能有效减少通信传输时延,避免信道拥塞,保证数据的可靠转发。
In VANET,when traffic flow reaches a certain density will cause the channel congestion,thus causing inefficiency of cooperative security applications. Aiming at this issue,this paper designed a beacon message transmission power control algorithm based on channel load forecasting. First of all,it evaluated the current time channel load by channel busy time ratio( CBR). Secondly,it predicted the next time channel load by the autoregressive integrated moving average model( ARIMA).Finally,it compared the value of channel load forecasting with the preset threshold,and adaptived adjustment of the next moment transmission power to avoid channel congestion. The simulation experiment shows that the algorithm can effectively reduce the communication transmission delay and avoid channel congestion,ensuring that the data be sent reliably.
In VANET,when traffic flow reaches a certain density will cause the channel congestion,thus causing inefficiency of cooperative security applications. Aiming at this issue,this paper designed a beacon message transmission power control algorithm based on channel load forecasting. First of all,it evaluated the current time channel load by channel busy time ratio( CBR). Secondly,it predicted the next time channel load by the autoregressive integrated moving average model( ARIMA).Finally,it compared the value of channel load forecasting with the preset threshold,and adaptived adjustment of the next moment transmission power to avoid channel congestion. The simulation experiment shows that the algorithm can effectively reduce the communication transmission delay and avoid channel congestion,ensuring that the data be sent reliably.
引文
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[8]李帅兵,谭国真,张福新,等.一种车联网自适应功率控制策略[J].小型微型计算机系统,2017,38(1):72-76.(Li Shuaibin,Tan Guozhen,Zhang Fuxin,et al. Adaptive power control strategy for VANET[J]. Journal of Chinese Computer Systems,2017,38(1):72-76.)
[9] Mo Yuanfu,Yu Dexin,Song Jun,et al. A beacon transmission power control algorithm based on wireless channel load forecasting in VANETs[J]. PLo S ONE,2015,10(11):e0142775.
[10]徐哲鑫,李世杰,林潇,等.面向车辆状态信息广播的功率控制算法[J].计算机应用,2016,36(8):2175-2180.(Xu Zhexin,Li Shijie,Lin Xiao,et al. Power control mechanism for vehicle status message in VANET[J]. Journal of Computer Applications,2016,36(8):2175-2180.)
[11]Fallah Y P,Nasiriani N,Krishnan H. Stable and fair power control in vehicle safety networks[J]. IEEE Trans on Vehicular Technology,2016,65(3):1662-1675.
[12]王燕.应用时间序列分析[M]. 2版.北京:中国人民大学出版社,2008.(Wang Yan. Application time series analysis[M]. 2nd ed.Beijing:China Renmin University Press,2008.)
[2] Fallah Y P,Huang C L,Sengupta R,et al. Analysis of information dissemination in vehicular Ad hoc networks with application to cooperative vehicle safety systems[J]. IEEE Trans on Vehicular Technology,2011,60(1):233-247.
[3] Xiang Weidong,Gozalvez J,Niu Zhisheng,et al. Wireless access in vehicular environments[J]. EURASIP Journal on Wireless Communications and Networking,2009,2009(1):576217.
[4] Kloiber B,Harri J,Strang T,et al. Random transmit power control for dsrc and its application to cooperative safety[J]. IEEE Trans on Dependable and Secure Compution,2016,13(1):18-31.
[5] Guo Wei Jie,Huang Liusheng,Sun Quan,et al. Delay-aware reliable broadcast scheme based on power control for VANETs[J]. Journal of China Universities of Posts and Telecommunications,2014,21(1):26-35.
[6]孙健,李宏智,郭灵波,等. VANET中一种安全消息拥塞控制机制[J].通信学报,2014,35(5):134-140.(Sun Jian,Li Hongzhi,Guo Lingbo,et al. Congestion control mechanism in VANET for safety messaging[J]. Journal on Communications,2014,35(5):134-140.)
[7]汪颖,张堑.基于路径中断概率的VANETs连接模型及性能分析[J].计算机工程与应用,2014,50(21):100-105.(Wang Ying,Zhang Qian. Path outage probability-based VANETs connection model and performance analysis[J]. Computer Engineering and Applications,2014,50(21):100-105.)
[8]李帅兵,谭国真,张福新,等.一种车联网自适应功率控制策略[J].小型微型计算机系统,2017,38(1):72-76.(Li Shuaibin,Tan Guozhen,Zhang Fuxin,et al. Adaptive power control strategy for VANET[J]. Journal of Chinese Computer Systems,2017,38(1):72-76.)
[9] Mo Yuanfu,Yu Dexin,Song Jun,et al. A beacon transmission power control algorithm based on wireless channel load forecasting in VANETs[J]. PLo S ONE,2015,10(11):e0142775.
[10]徐哲鑫,李世杰,林潇,等.面向车辆状态信息广播的功率控制算法[J].计算机应用,2016,36(8):2175-2180.(Xu Zhexin,Li Shijie,Lin Xiao,et al. Power control mechanism for vehicle status message in VANET[J]. Journal of Computer Applications,2016,36(8):2175-2180.)
[11]Fallah Y P,Nasiriani N,Krishnan H. Stable and fair power control in vehicle safety networks[J]. IEEE Trans on Vehicular Technology,2016,65(3):1662-1675.
[12]王燕.应用时间序列分析[M]. 2版.北京:中国人民大学出版社,2008.(Wang Yan. Application time series analysis[M]. 2nd ed.Beijing:China Renmin University Press,2008.)